Help desk: How sensitive is your motion detector sensor?
Recently, I blogged about using the motion detector sensor to increase the security presence of your data center. Well, expanding on the topic, I thought I would answer one of those frequently asked questions I get from customers using the motion detector to beef up security. “How do I keep the motion sensor from being set off by very small movements?” The answer – you can adjust the sensitivity of the motion detector using the sensor status filter.
The sensor status filter allows you to enter a time delay that must occur before the sensor changes status, thus filtering out noise in the signal. This avoids unnecessary sending of notifications, as fluctuations can occur during normal working conditions.
To find this setting, go to the Motion Sensor Settings page of the web interface, and click on the sensor status filters button. Change the “Continuous time (secs) sensor is to report” field to some value other than zero. 1 second is a good place to start, but it all depends on your specific working conditions.
At any rate, increasing the continuous time to report field a bit can help keep you from getting false positives and give a little extra room for normal environmental shifts.
Stay tuned to the Ravica blog for more helpful environmental monitoring tips.
~ Jon Mills
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The winding road – Ravica probes used in road construction.
Everyday I find new use for our Ravica Sensor probes!
Last week I was working with a road construction company who was just awarded a contract to pave two runways at a local airport. Over all, this was a good size project and it had a few unique compliance requirements.
The company had to make sure that the outside temperature and humidity of the paving units was always below 89 degrees. If the temp went up above 89, an audible alarm and a flashing light would go off.
To be honest with you, I didn’t think we were going to be able to retrofit the paving units to supply this data. I mean, it’s not the most hospitable environment. Reluctantly, I conveyed my feelings to the customer. To my surprise, he informed me that each one of the paving units had a small building that managed the team. Each one of these buildings were fully equipped to handle the SensorProbes!
So, we spent an hour going over the requirements and hashing out the details. In the end, I recommend that they purchase a BitSight2, a Single Port Temperature and Humidity Sensor and a Siren/ Strobe Light sensor for each 
management trailer. Since this is a hostile environment, we decided to go with the weather proof option for the Single Port Temperature and Humidity Sensor.
The compliance specifications required them to store this data for review. I recommended that they use Denika to store historical data for reporting. With Denika they would be able to trend the temperature and humidity over time. They would also have the ability to set a threshold. In this example, it would be 90 degrees. Once that threshold has been violated, a syslog would be send to Logalot. This would provide all the needed data for the required compliance reports.
With Logalot they would be able to perform multi-level alarms. With this solution, they would be able to trigger the visual alarm and email or page multiple people instantly. In addition to the alerting, they would be able to search and report on the syslog data sent from the probes. I was able to show him how script could be triggered to do just about anything. In this case, we would be playing an audio file over an amplified speaker.
The client liked the solution and said that he would present it to the decision maker. I just heard from them and they are going to go with our solution!
JimmyD
Monitoring cooler or freezer temperature
Filed under: environmental monitoring, humidity monitoring, temperature monitoring
Many of our customers need to monitor the temperature of commercial freezers or coolers and be notified if the temperature drops. Loss of perishable inventory can be substantial.
Temperature Monitor
A freezer temperature monitor can easily be installed in most old or newer model systems. Consider it a kind of 7×24 cooler or freezer guard.
If you are looking for a temperature alarm and monitor solution for your refrigerators, freezers, or coolers, this solution can notify you immediately any time, day or night, if temperature drops.
Sound the Alarms!
It sounds an audible alarm and alerts one or more people(s) via phone, pager or other. You can use any web browser – even a cell phone to see the temperature of any refrigerator/freezer.
More than just Temperature
This product can be used for more than monitoring freezer temperature. It can also be used for:
- Monitoring humidity
- Monitoring for smoke
- Monitoring for electricity loss
- Monitoring for motion (i.e. security)
- Monitoring for water
- And much, much more
Check out ravica.com.
All my peeps have a smartphone!
Today is a hot day here in Maine. When it gets hot, in the 90’s, things slow down quickly. You have to remember that our bodies, our minds and our buildings are programed with the goal of staying warm. Staying cool just 
isn’t a necessity, since we have four warm days out of the year.
Like I said, today is hot. So to help deal with the heat, I decided to write about a light subject, something easy to swallow. Today’s blog is about my peeps and their SmartPhones.
Jon has an iPhone. I nag Jon everyday for being an Apple lemming. My issue with Apple goes back a long time and is purely personal. I was a eight years old and I really wanted a Macintosh. My parents couldn’t afford a Mac, it was only for the better off people. This divide made me bitter.
As far as a phone goes, it is one of the best. The double touch screen is slick, over all he doesn’t seem to have any complaints. The software selection is good but regulated. If Apple doesn’t want you to build a program for their phone, then you can’t sell it. Again, I’m kinda bitter about this.
I have the AT&T Tilt. This is a Windows Mobile phone that has its good and bad points. The best thing about my phone is that it is NOT an iPhone.
Since the Windows Mobile environment stretches across multiple platforms and has been around for quite a while, the software selection is abundant. In general it is an open environment and has a vibrant community.
The screen isn’t as responsive as I would like and sometimes you can really mess up your phone if you install the wrong piece of untested software. Can you say “Bricked!”?
Dale just got a Google phone. Dale was one of those people who always said, “I don’t need a phone like yours. I only make calls.” It has been a few days, and he has clearly changed his song. He is now a disciple of the goodness that is SmartPhone technology. Dale is installing apps, using GPS, texting and making calls. He is a happy camper.
So why am I telling you about my peeps and their different phones? Simply put, we have three different camps of people, with three different ways of thinking.
You have your iPhone people, who want their provider to make sure every app works on your phone, protects you from any bad application and distributes their apps via one common provider. You get a good, safe and friendly phone.
You have the Windows Mobile camp, who believe that any app, no matter how bad or untested it is, should be available. They want choice, multiple phones, multiple options and freedom. The Windows Mobile world has its ups and downs. If you are not careful, you can get more then you bargained for.
The GPhone has a large community. Their software is built on an open source environment. They are safe, regulated by the users, tested by the users and over all crunchy.
Even though all of these phones are different, they still can easily communicate with each other. Maybe our politicians should learn a lesson from the ups and downs of the SmartPhone market? Maybe they could learn to communicate with each other in one common protocol and have the luxury of error checking?
What a wonderful world we live in? I wonder what technology my daughter will use when she is my age?
- JimmyD
Motion detector sensors add security to your data center
Filed under: Security Monitoring, environmental monitoring, motion detector
While working on a project recently, I was taught the importance of the motion detector sensor in the security monitoring toolset. The SecurityProbe is the first place to look for monitoring the temperature, humidity and other environmental variables of your server room, while at the same time adding a security presence with the pan-tilt dome camera support. However, for some customers with smaller or unconventional data centers, the budget for security and environmental monitoring can be in the hundreds of dollars, not thousands.
That’s where the motion detector comes in. It works not only with the SecurityProbe line, but with the BitSight2 and BitSight8 as well. The beauty of the motion detector sensor is that you can daisy chain up to 10 sensors to work off a single intelligent sensor port. And at just $125 per sensor, users can easily cover a good sized data room with motion detection and still have an extra intelligent sensor port on even a BitSight2 for monitoring temperature and humidity.
So keep the motion detector sensor in mind when speccing out a new data room or when adding security monitoring measures to an existing one. It is a very affordable alternative, when it is simply not possible to have eyes and ears on your secure locations.
For more information about our security monitoring solutions, call us at 207-324-8173.
~ Jon Mills
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Temperature monitoring software
Filed under: environmental monitoring, humidity monitoring, temperature monitoring
Our data center temperature gets hot. We have loads of switches, routers and servers, and the heat produced can be substantial. We have software to report on sFlow, NetFlow, SNMP, syslogs, traps, etc., and of course we have temperature monitoring software as well.
In the palm of my hand
We obviously use our temperature monitoring probes, which also take care of humidity monitoring. Look how small these things are:
Since the one probe can do both temperature and humidity sensing, the second port can be used to detect water, smoke, or any of our other environmental monitoring sensors.
No temperature monitoring program needed
This little device has a web server built in, so you can hit it with an IE or FireFox web browser. The unit is self contained, and prices start at $250. It also supports SNMP. Check out the live environmental monitoring demos:
BitSight2 Demo – Password=”ravica”
SecurityProbe Demo – No password required
This is really cool stuff at a great value. Call ravica.com about these at (207) 324-8173.
- Mike
Ravica’s Sensor Controlled Relay – The Rosetta Stone?
Filed under: Data Center, airflow monitoring, environmental monitoring
A few weeks ago I talked about using the sensor controlled relay to turn on lights once an alarm had been triggered. In this blog I wanted to give another example of how versatile these units can be.
Solutions . . .
A great example is the solution that I found for a local amusement park. One of their outdoor venues was having an 
issue with their digital photography equipment overheating. It wasn’t economical to add air condition to the unit, so they needed to find a way to turn on multiple overhead fans automatically.
The management of this unit fell under the IT department, and the admin wanted to remotely monitor the data from his office (or any other portable device). The end solution was to monitor multiple environmental variables with the Ravica Sensor Probe and use the Sensor Controlled Relay to switch on the fan when the room temperature rises beyond the threshold level.
Since the sensor control unit has a user friendly web interface and an autosense feature, setting up the Sensor Controlled Relay is easy. The Sensor Controlled Relay can also be controlled via external computers, using the included SNMP command line utilities either interactively or programmatically.
From the unit itself, you can monitor the status of the Sensor Controlled Relay by four LEDs on the board. You can also monitor the unit remotely by using SNMP traps or the web interface, as well as e-mail and SMS alerts.
Implementation . . .
“The Sensor Controlled Relay provides 1 high-power SPDT 5V relay, with the maximum load up to 15A at 220 VAC. It includes Metal Oxide Varistors (MOVs) and Snubber circuits to protect the open contacts of the relays from high voltage spikes or noise transients. It monitors the power and load, and accepts a control signal, which is sent from the SensorProbe.”
We outsourced a local contractor to do the electrical work and the end result was better then we expected. Not only did we eliminate the equipment from overheating, but we are also able to trend the temp of the units over a given amount of time. This gave the admin a better picture of demand and heat generation.
Another thing to remember is the inlaid protection of this sensor. The Sensor Controlled Relay, it has a built in 16Amp circuit breaker and a 15Amp fuse (380 VAC, 125 VDC) giving it double protection for the external devices and possible damages by electrical fault. This assures protection for your sensor and your investment.
Conclusion . . .
As you can see, the Ravica Sensor Controlled Relay has many uses. It’s ability to control an array of analog devices makes it a versatile solution. It’s ability to monitor and protect itself make it a smart investment. That is why I recommend it every chance that I get.
- JimmyD
Remote UNIX server shutdown with SecurityProbe
Today, I thought I would take the time to highlight one of the features that makes the SecurityProbe environmental and security monitoring system so special. Where the BitSight line of probes are great entry level systems, the SecurityProbe line has many additional features that really set it apart; as well as support for the thermocouple sensor and the power monitor.
So what feature am I detailing then? Let’s talk about the server shutdown feature. Basically, the SecurityProbe can be configured to automatically shutdown a server when an event occurs. An example might be that you want to shutdown a cluster of servers based on the status of an AC voltage sensor. When you get an alert that the power went out and you are running on battery backup, this could keep your non-essential equipment from sucking up all the remaining juice.
Wondering how you configure this on your SecurityProbe? You are in luck! Just follow the instructions below.
Setup of UNIX shutdown action and notification
1. Create new Action
- Select the “Notifications” page, then “Add Action” from the left panel.
- You can rename the action in the “Action Name” box.
2. Select “Shutdown” from the “Action” drop down menu.
3. Select “UNIX (SSH)” from the “OS Platform” drop down menu.
4. Input your servers IP address into the “Remote Server IP” box.
5. Input your log in username into the “Remote Server Login Name” box.
6. Click on “Add Server”. Add additional IP’s if needed. Click “Next”.
7. Click “Reset Public Key” (If you already have a Public Key, skip this step and proceed to step number 11 below).
8. After clicking “Reset Public Key” a new Window will then pop up, press “Generate”.
9. The unit will now generate a new public key. It will normally take approximately 1 to 3 minutes for the system to generate the new public key, so please be patient.
10. After the public key has been generated, press “Use This Public Key”.
11. Open a Telnet or SSH session to the unit.
cd ~/.ssh
ls
rm known_hosts
12. Make sure to delete the know_hosts file to ensure generating a new list of hosts when using this command shown above.
ssh @
When
is User name in server
is IP address of server
13. Then connect to the server by using this command shown above.
cd ~/.ssh
cat > authorized_keys
#copy public key from web interface and press (for putty can press by right click)
#press Enter button and press Ctrl + c for exit cat command
14. After connecting to the server, create an authorized_keys file by using this command shown above
15. Then disconnect from the server and connect to the unit.
ssh –I /flash1/user/shutdown_notify/dsskey.db @
When
is User name in server
is IP address of server
16. Now test the public key by using this command shown above.
17. Return to the units web interface and click “Next”.
18. You can now set the other settings in the Shutdown action and click “Next”.
19. You can also enable a shutdown message to be sent by first choosing “Enabled”, then entering your message in the “Shutdown Message” box, then clicking “Finish”.
That’s all there is to it. Stay tuned for more SecurityProbe exclusive feature spotlights.
~ Jon Mills
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Airflow in data centers requires careful monitoring
Monitoring the temperature of a room from a single location sometimes does not provide a good overall representation of the ambient environmental conditions. I asked around and found out about Computational Fluid Dynamics (CFD). CFD can provide 3-D analysis of how air is moving through a data center and identify potential warm areas where equipment is likely suffering from too little airflow.
I think it would be cool if our solution could provide a diagram as shown below:
I found the above image from a company called inres.com. They make a product called TileFlow. TileFlow is a powerful three-dimensional software tool for simulating cooling performance of data centers. It uses the state-of-the-art computational fluid dynamics (CFD) techniques, and is applicable to both raised-floor and non-raised-floor data centers.
If you don’t have unlimited resources, you could use our gear to create a map that looks like this:
The above is web based and the LEDs representing temperature, humidity and airflow change color based on thresholds. Notifications can be sent, and visual trends are provided, as well. It is a low cost solution, starting at $325.00 for temperature and humidity monitoring, and an airflow sensor can be added for another $125.00. That is tough to beat.
Contact us for a live demonstration of this capability.
- Mike
School uses Ravica sensorprobes to measure green energy
Filed under: SensorProbes, environmental monitoring, power monitoring
We just received a call from a community college in the Mid West. They wanted to purchase four AC Voltage Detectors to integrate into their solar and wind power project. Since I am big on alternative energy and the application of technology to measure it, I jumped on this call right away.
The energy project is a collaboration between the Engineering and Information Technology programs of the college and funded by a local community grant. The goal of the project was to help middle school students build two unique energy sources using the power, and in the end, collect data for reporting. Each energy segment needs to be monitored separately. The first segment was going to be wind and the second would be solar.
The solar side would consist of two collectors and one battery storage unit. Each one of these collectors would have a sensorprobe (the storage unit would have a sensor probe and a digital voltmeter). This would allow the team to record how much energy the cells produced, at any given time. We would also be able to tell the combined energy sent to the storage unit and, at the same time, tell how much energy is in the storage unit.
The wind side would have a similar setup. Each turbine would have a sensor. This would tell us how much energy the turbine was producing. Adding the digital voltmeter to the main feed of the storage unit would tell us combined energy production. The AC Voltage Detector would tell us the state of the wind turbines at any time. What makes the wind side of the project different is that the turbine can produce energy any time.
In both of these cases, the students would have to construct the power units from general industry parts. They couldn’t buy an off the self solution. One of the reasons they decided to go with the Ravica line of sensorprobes for data collection was due to the fact that the probes were totally independent of the energy production system. Setting alarms gives you the added feature of being able to monitor the entire system. This is what they needed to meet the needs of the project, not to mention it helped them come in under budget.
On the data side of things, the team would compile the data from each sensor and reference hourly data from gathered the NOAA weather data. They would then take all of this data and feed it to a community web portal. In the end, they would be able to see how much energy each unit was able to produce at any time. They would all be able to see how weather played in each of the individual units production, and if the entire system compensates for any loss per unit.
I am going to keep this project on my radar. It’s exciting to see these kids having fun and exploring alternitive forms of energy.
- JimmyD